The Terasic DE1 is an Altera FPGA development board.
Pin Mapping
Switches
Switches
| Function
|
FPGA Pin
|
| Toggle 0
|
PIN_L22
|
| Toggle 1
|
PIN_L21
|
| Toggle 2
|
PIN_M22
|
| Toggle 3
|
PIN_V12
|
| Toggle 4
|
PIN_W12
|
| Toggle 5
|
PIN_U12
|
| Toggle 6
|
PIN_U11
|
| Toggle 7
|
PIN_M2
|
| Toggle 8
|
PIN_M1
|
| Toggle 9
|
PIN_L2
|
| Pushbutton 0
|
PIN_R22
|
| Pushbutton 1
|
PIN_R21
|
| Pushbutton 2
|
PIN_T22
|
| Pushbutton 3
|
PIN_T21
|
LEDs
LEDs
| Function
|
FPGA Pin
|
| LED Red 0
|
PIN_R20
|
| LED Red 1
|
PIN_R19
|
| LED Red 2
|
PIN_U19
|
| LED Red 3
|
PIN_Y19
|
| LED Red 4
|
PIN_T18
|
| LED Red 5
|
PIN_V19
|
| LED Red 6
|
PIN_Y18
|
| LED Red 7
|
PIN_U18
|
| LED Red 8
|
PIN_R18
|
| LED Red 9
|
PIN_R17
|
| LED Green 0
|
PIN_U22
|
| LED Green 1
|
PIN_U21
|
| LED Green 2
|
PIN_V22
|
| LED Green 3
|
PIN_V21
|
| LED Green 4
|
PIN_W22
|
| LED Green 5
|
PIN_W21
|
| LED Green 6
|
PIN_Y22
|
| LED Green 7
|
PIN_Y21
|
7-segment Displays
7-segment Displays
| Function
|
FPGA Pin
|
| Seven Segment Digit 0 Segment 0
|
PIN_J2
|
| Seven Segment Digit 0 Segment 1
|
PIN_J1
|
| Seven Segment Digit 0 Segment 2
|
PIN_H2
|
| Seven Segment Digit 0 Segment 3
|
PIN_H1
|
| Seven Segment Digit 0 Segment 4
|
PIN_F2
|
| Seven Segment Digit 0 Segment 5
|
PIN_F1
|
| Seven Segment Digit 0 Segment 6
|
PIN_E2
|
| Seven Segment Digit 1 Segment 0
|
PIN_E1
|
| Seven Segment Digit 1 Segment 1
|
PIN_H6
|
| Seven Segment Digit 1 Segment 2
|
PIN_H5
|
| Seven Segment Digit 1 Segment 3
|
PIN_H4
|
| Seven Segment Digit 1 Segment 4
|
PIN_G3
|
| Seven Segment Digit 1 Segment 5
|
PIN_D2
|
| Seven Segment Digit 1 Segment 6
|
PIN_D1
|
| Seven Segment Digit 2 Segment 0
|
PIN_G5
|
| Seven Segment Digit 2 Segment 1
|
PIN_G6
|
| Seven Segment Digit 2 Segment 2
|
PIN_C2
|
| Seven Segment Digit 2 Segment 3
|
PIN_C1
|
| Seven Segment Digit 2 Segment 4
|
PIN_E3
|
| Seven Segment Digit 2 Segment 5
|
PIN_E4
|
| Seven Segment Digit 2 Segment 6
|
PIN_D3
|
| Seven Segment Digit 3 Segment 0
|
PIN_F4
|
| Seven Segment Digit 3 Segment 1
|
PIN_D5
|
| Seven Segment Digit 3 Segment 2
|
PIN_D6
|
| Seven Segment Digit 3 Segment 3
|
PIN_J4
|
| Seven Segment Digit 3 Segment 4
|
PIN_L8
|
| Seven Segment Digit 3 Segment 5
|
PIN_F3
|
| Seven Segment Digit 3 Segment 6
|
PIN_D4
|
VGA
VGA
| Function
|
FPGA Pin
|
| VGA Red 0
|
PIN_D9
|
| VGA Red 1
|
PIN_C9
|
| VGA Red 2
|
PIN_A7
|
| VGA Red 3
|
PIN_B7
|
| VGA Green 0
|
PIN_B8
|
| VGA Green 1
|
PIN_C10
|
| VGA Green 2
|
PIN_B9
|
| VGA Green 3
|
PIN_A8
|
| VGA Blue 0
|
PIN_A9
|
| VGA Blue 1
|
PIN_D11
|
| VGA Blue 2
|
PIN_A10
|
| VGA Blue 3
|
PIN_B10
|
| VGA Sync H
|
PIN_A11
|
| VGA Sync V
|
PIN_B11
|
Audio CODEC
Audio CODEC
| Function
|
FPGA Pin
|
| Audio CODEC ADC LR Clock
|
PIN_A6
|
| Audio CODEC ADC Data
|
PIN_B6
|
| Audio CODEC DAC LR Clock
|
PIN_A5
|
| Audio CODEC DAC LR Clock
|
PIN_B5
|
| Audio CODEC Chip Clock
|
PIN_B4
|
| Audio CODEC Bit-Stream Clock
|
PIN_A4
|
| Audio CODEC I2C Data
|
PIN_A3
|
| Audio CODEC I2C Clock
|
PIN_B3
|
Clock/Serial Comms
Clock/Serial Comms
| Function
|
FPGA Pin
|
| Clock 24MHz (from USB Blaster)
|
PIN_A12, PIN_B12
|
| Clock 27MHz
|
PIN_D12, PIN_E12
|
| Clock 50MHz
|
PIN_L1
|
| RS232 Receive
|
PIN_F14
|
| RS232 Transmit
|
PIN_G12
|
| PS/2 Clock
|
PIN_H15
|
| PS/2 Data
|
PIN_J14
|
SDRAM
SDRAM
| Function
|
FPGA Pin
|
| SDRAM Address 0
|
PIN_W4
|
| SDRAM Address 1
|
PIN_W5
|
| SDRAM Address 2
|
PIN_Y3
|
| SDRAM Address 3
|
PIN_Y4
|
| SDRAM Address 4
|
PIN_R6
|
| SDRAM Address 5
|
PIN_R5
|
| SDRAM Address 6
|
PIN_P6
|
| SDRAM Address 7
|
PIN_P5
|
| SDRAM Address 8
|
PIN_P3
|
| SDRAM Address 9
|
PIN_N4
|
| SDRAM Address 10
|
PIN_W3
|
| SDRAM Address 11
|
PIN_N6
|
| SDRAM Data 0
|
PIN_U1
|
| SDRAM Data 1
|
PIN_U2
|
| SDRAM Data 2
|
PIN_V1
|
| SDRAM Data 3
|
PIN_V2
|
| SDRAM Data 4
|
PIN_W1
|
| SDRAM Data 5
|
PIN_W2
|
| SDRAM Data 6
|
PIN_Y1
|
| SDRAM Data 7
|
PIN_Y2
|
| SDRAM Data 8
|
PIN_N1
|
| SDRAM Data 9
|
PIN_N2
|
| SDRAM Data 10
|
PIN_P1
|
| SDRAM Data 11
|
PIN_P2
|
| SDRAM Data 12
|
PIN_R1
|
| SDRAM Data 13
|
PIN_R2
|
| SDRAM Data 14
|
PIN_T1
|
| SDRAM Data 15
|
PIN_T2
|
| SDRAM Bank Address 0
|
PIN_U3
|
| SDRAM Bank Address 1
|
PIN_V4
|
| SDRAM Low-byte Data Mask
|
PIN_R7
|
| SDRAM High-byte Data Mask
|
PIN_M5
|
| SDRAM Row Address Strobe
|
PIN_T5
|
| SDRAM Column Address Strobe
|
PIN_T3
|
| SDRAM Clock Enable
|
PIN_N3
|
| SDRAM Clock
|
PIN_U4
|
| SDRAM Write Enable
|
PIN_R8
|
| SDRAM Chip Select
|
PIN_T6
|
SRAM
SRAM
| Function
|
FPGA Pin
|
| SRAM Address 0
|
PIN_AA3
|
| SRAM Address 1
|
PIN_AB3
|
| SRAM Address 2
|
PIN_AA4
|
| SRAM Address 3
|
PIN_AB4
|
| SRAM Address 4
|
PIN_A5
|
| SRAM Address 5
|
PIN_AB10
|
| SRAM Address 6
|
PIN_AA11
|
| SRAM Address 7
|
PIN_AB11
|
| SRAM Address 8
|
PIN_V11
|
| SRAM Address 9
|
PIN_W11
|
| SRAM Address 10
|
PIN_R11
|
| SRAM Address 11
|
PIN_T11
|
| SRAM Address 12
|
PIN_Y10
|
| SRAM Address 13
|
PIN_U10
|
| SRAM Address 14
|
PIN_R10
|
| SRAM Address 15
|
PIN_T7
|
| SRAM Address 16
|
PIN_Y6
|
| SRAM Address 17
|
PIN_Y5
|
| SRAM Data 0
|
PIN_AA6
|
| SRAM Data 1
|
PIN_AB6
|
| SRAM Data 2
|
PIN_AA7
|
| SRAM Data 3
|
PIN_AB7
|
| SRAM Data 4
|
PIN_AA8
|
| SRAM Data 5
|
PIN_AB8
|
| SRAM Data 6
|
PIN_AA9
|
| SRAM Data 7
|
PIN_AB9
|
| SRAM Data 8
|
PIN_Y9
|
| SRAM Data 9
|
PIN_W9
|
| SRAM Data 10
|
PIN_V9
|
| SRAM Data 11
|
PIN_U9
|
| SRAM Data 12
|
PIN_R9
|
| SRAM Data 13
|
PIN_W8
|
| SRAM Data 14
|
PIN_V8
|
| SRAM Data 15
|
PIN_U8
|
| SRAM Write Enable
|
PIN_AA10
|
| SRAM Output Enable
|
PIN_T8
|
| SRAM High-byte Data Mask
|
PIN_W7
|
| SRAM Low-byte Data Mask
|
PIN_Y7
|
| SRAM Chip Enable
|
PIN_AB5
|
Flash
Flash
| Function
|
FPGA Pin
|
| Flash Address 0
|
PIN_AB20
|
| Flash Address 1
|
PIN_AA14
|
| Flash Address 2
|
PIN_Y16
|
| Flash Address 3
|
PIN_R15
|
| Flash Address 4
|
PIN_T15
|
| Flash Address 5
|
PIN_U15
|
| Flash Address 6
|
PIN_V15
|
| Flash Address 7
|
PIN_W15
|
| Flash Address 8
|
PIN_R14
|
| Flash Address 9
|
PIN_Y13
|
| Flash Address 10
|
PIN_R12
|
| Flash Address 11
|
PIN_T12
|
| Flash Address 12
|
PIN_AB14
|
| Flash Address 13
|
PIN_AA13
|
| Flash Address 14
|
PIN_AB13
|
| Flash Address 15
|
PIN_AA12
|
| Flash Address 16
|
PIN_AB12
|
| Flash Address 17
|
PIN_AA20
|
| Flash Address 18
|
PIN_U14
|
| Flash Address 19
|
PIN_V14
|
| Flash Address 20
|
PIN_U13
|
| Flash Address 21
|
PIN_R13
|
| Flash Data 0
|
PIN_AB16
|
| Flash Data 1
|
PIN_AA16
|
| Flash Data 2
|
PIN_AB17
|
| Flash Data 3
|
PIN_AA17
|
| Flash Data 4
|
PIN_AB18
|
| Flash Data 5
|
PIN_AA18
|
| Flash Data 6
|
PIN_AB19
|
| Flash Data 7
|
PIN_AA19
|
| Flash Output Enable
|
PIN_AA15
|
| Flash Reset
|
PIN_W14
|
| Flash Write Enable
|
PIN_Y14
|
